python监测当前联网状态并连接的实例

def test1(): import os return1=os.system('ping 8.8.8.8') if return1:  print 'ping fail'  os.system('msdt.exe /id NetworkDiagnosticsNetworkAdapter')#调用系统网络诊断 else:  print 'ping'def test2(): import os import subprocess  fnull = open(os.devnull, 'w') return1 = subprocess.call('ping 8.8.8.8', shell = True, stdout = fnull, stderr = fnull) if return1:  return1 = subprocess.call('msdt.exe /id NetworkDiagnosticsNetworkAdapter', shell=True, stdout=fnull, stderr=fnull)  print 'ping fail' else:  print 'ping ok' fnull.close() if __name__=='__main__': test2()